US20080121685A1 - Method and apparatus for reducing pin count for connection of a miniaturized form factor card in a mobile information device - Google Patents
Method and apparatus for reducing pin count for connection of a miniaturized form factor card in a mobile information device Download PDFInfo
- Publication number
- US20080121685A1 US20080121685A1 US11/530,766 US53076606A US2008121685A1 US 20080121685 A1 US20080121685 A1 US 20080121685A1 US 53076606 A US53076606 A US 53076606A US 2008121685 A1 US2008121685 A1 US 2008121685A1
- Authority
- US
- United States
- Prior art keywords
- card
- input
- output signals
- serial data
- operational
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
- G06F1/22—Means for limiting or controlling the pin/gate ratio
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F13/00—Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
- G06F13/38—Information transfer, e.g. on bus
- G06F13/42—Bus transfer protocol, e.g. handshake; Synchronisation
- G06F13/4282—Bus transfer protocol, e.g. handshake; Synchronisation on a serial bus, e.g. I2C bus, SPI bus
- G06F13/4291—Bus transfer protocol, e.g. handshake; Synchronisation on a serial bus, e.g. I2C bus, SPI bus using a clocked protocol
Abstract
Description
- This application is co-pending with U.S. application Ser. No. 11/308,221 filed on Mar. 13, 2006 entitled MINIATURIZED FORM FACTOR WIRELESS COMMUNICATIONS CARD FOR GENERIC MOBILE INFORMATION DEVICES and with U.S. application Ser. No. 11/308,559 filed on Apr. 6, 2006 entitled CONNECTOR FOR A HIGHLY INTEGRATED, INSTALLABLE MINIATURIZED FORM FACTOR CARD FOR WIRELESS COMMUNICATIONS FUNCTIONS both having the same assignee as the present application, the disclosures of which are incorporated herein as though fully set forth.
- 1. Field of the Invention
- This invention relates generally to the field of internal device interconnection and more particularly to the use of a serial data link for connection of a miniaturized form factor communications card to a mobile information device for reducing the pin count in the connector.
- 2. Description of the Related Art
- Connection of removable elements in an electronic device such mobile information devices is typically accomplished using multiple connection blade, pin, ball or multipad elastomeric connectors. For elements which will regularly be inserted and removed from the mobile information device, particularly by end users, the greater the number of inputs connected through the connector the higher the likelihood of failure of the connector due to breakage or contamination. For devices such as a wireless communications system as disclosed for a miniaturized form factor card in copending application Ser. No. 11/308,221 filed on Mar. 13, 2006 entitled MINIATURIZED FORM FACTOR WIRELESS COMMUNICATIONS CARD FOR GENERIC MOBILE INFORMATION DEVICES a large number of communication and system interface functions must be accommodated and a typical embodiment employs either a 70 or a 49 pin connector depending on the level of integration in the miniaturized form factor card. A reduction in pin count of the connector would simplify the connector itself and reduce cost while simultaneously reducing the potential for damage to the connector elements on the card or in the mobile information device.
- It is therefore desirable to provide a system with reduced pin count connection for a card insertable in a mobile information device to reduce the potential for damage.
- It is also desirable to provide a system with reduced pin count connection for a card insertable in a mobile information device to reduce connector complexity and cost.
- It is further desirable to increase the functionality of an insertable card without requiring additional pin count for the added functions.
- The present invention provides a reduced pin count connection system for an insertable operational systems card having a plurality of input and output signals to a host device having operational circuits responsive to the input and output signals of the card. A master serial data link is provided in the card for communicating at least a portion of the plurality of input and output signals of the card. A slave serial data link is operably interconnected to the master serial data link through a connector having a second plurality contacts less than the plurality of input and output signals and communicates the input and output signals to the operational circuits in the host device.
- For an exemplary embodiment, the host device is a mobile information device and the insertable operational systems card is a wireless communications card providing operational functions to the host including voice data using a speaker/microphone system and control signals to an LCD. The card receives input from a keyboard integrated in the host with the voice data, control signals and keyboard input transmitted through the master and slave serial data links.
- These and other features and advantages of the present invention will be better understood by reference to the following detailed description when considered in connection with the accompanying drawings wherein:
-
FIG. 1 is a pictorial representation of a miniaturized form factor card and a mobile information device in which the card is removably inserted with reference to the two connector moieties of an embodiment of the present invention; -
FIG. 2 is a block diagram of the internal elements of the data transmission elements in the miniaturized form factor card and the mobile information device which exchange data for cooperative operation of the mobile information device with the card inserted; and -
FIG. 3 is a data diagram of transmission through the serial data link interface. - Referring to the drawings,
FIG. 1 shows amobile information device 10 provided with aconnection slot 12 to receive a miniaturizedform factor card 14, such as that described in patent application Ser. No. 11/308,221 previously referenced, to provide wireless communications or other operational functions to the mobile information device which hosts the card. The connection functions A provided through theconnector moiety 16 on the card are compatible with the connection functions B provided through theconnector moiety 18 associated with the connection slot for the card in the mobile information device. - As shown in
FIG. 2 the connection functions A of the card provide the interface for theoperational circuits 20 in the card. The input and output requirements for an exemplary embodiment of the card are shown in table 1 and represented by theexemplary bus lines 22 inFIG. 2 . -
TABLE 1 Type Modem only Handset Core Total Pin Count 49 70 Black White LCD IF N/A Support 8 Bit Color LCD IF N/A Support Keypad IF N/A Support Audio(Mic, Spkr, Earphone) IF Support Support SIM IF Support Support USB IF Support Support UART IF Support (2) Support (1) 4 bit SDIO IF Support N/A RF IF Support Support - A master serial data link (SDL) 23 is provided in the card to convert at least a portion of the signals from operational circuits for transmission as serial data over the
interface connections 24 to aslave SDL 26 in the mobile information device. Only signals transmitted between the SDL converting circuits are shown in the embodiment in the drawings, however, in alternative embodiments predetermined signal paths are provided directly through pin elements in the connectors in combination with the SDL pins. The slave SDL provides signals to and from the operational circuits in the mobile information device such as the display circuit 28 (LCD), thekeyboard circuit 30 and thevibrator circuit 32 as well as voice data using the speaker/microphone system 33. The operational circuits identified in the embodiment shown in the drawings are exemplary and other operational circuits for both the card and mobile information device are employed in alternative embodiments. The SDL converting circuits communicate using three connector elements to provide amaster clock MC 34, a first master data signal (MDO) 36 and a second master data signal (MD1) 38. Aground 40 is employed in the circuit embodied in the drawings. - The data input/output for the operational circuits of the card and MID for the SDL is shown in
FIG. 3 . Three signal types need to be transferred through SDL Bridge: LCD, Voice, and keyboard. As shown inFIG. 3 , a synchronization signal (SYNC) 42 is used for synchronization of frames and identifies initiation of a new frame of data. Acomplete frame 44 of data includes three signals sets: LCD (data 1) 46, voice (data2) 48, and keyboard (data3) 50. Data transferred in afirst time slot 52 in the frame (data1) constitutes the LCD signal. Data transferred in asecond time slot 54 in the frame (data2) constitutes the voice signal. Data transferred in athird time slot 56 in the frame (data3) constitutes the keyboard signal. Frames are continuously transmitted according to the SYNC signal for communication between the MID and the card operational circuits. Data transfer is accomplished using themaster clock signal 58. - Having now described the invention in detail as required by the patent statutes, those skilled in the art will recognize modifications and substitutions to the specific embodiments disclosed herein. Such modifications are within the scope and intent of the present invention as defined in the following claims.
Claims (8)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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US11/530,766 US7392954B2 (en) | 2006-09-11 | 2006-09-11 | Method and apparatus for reducing pin count for connection of a miniaturized form factor card in a mobile information device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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US11/530,766 US7392954B2 (en) | 2006-09-11 | 2006-09-11 | Method and apparatus for reducing pin count for connection of a miniaturized form factor card in a mobile information device |
Publications (2)
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US20080121685A1 true US20080121685A1 (en) | 2008-05-29 |
US7392954B2 US7392954B2 (en) | 2008-07-01 |
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US11/530,766 Active - Reinstated 2026-09-14 US7392954B2 (en) | 2006-09-11 | 2006-09-11 | Method and apparatus for reducing pin count for connection of a miniaturized form factor card in a mobile information device |
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Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6385263B1 (en) * | 1999-08-17 | 2002-05-07 | Hiband Semiconductor, Inc. | Method and apparatus for accomplishing high bandwidth serial communication between semiconductor devices |
US20030016487A1 (en) * | 2001-07-06 | 2003-01-23 | Acer Inc. | Method and apparatus of interface conversion for handheld device |
US20030063567A1 (en) * | 2001-10-02 | 2003-04-03 | Stmicroelectronics, Inc. | Ethernet device and method for extending ethernet FIFO buffer |
US20050120253A1 (en) * | 2003-10-24 | 2005-06-02 | Neil Morrow | PC Card controller with reduced number of terminals |
US20050120163A1 (en) * | 2003-12-02 | 2005-06-02 | Super Talent Electronics Inc. | Serial Interface to Flash-Memory Chip Using PCI-Express-Like Packets and Packed Data for Partial-Page Writes |
-
2006
- 2006-09-11 US US11/530,766 patent/US7392954B2/en active Active - Reinstated
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6385263B1 (en) * | 1999-08-17 | 2002-05-07 | Hiband Semiconductor, Inc. | Method and apparatus for accomplishing high bandwidth serial communication between semiconductor devices |
US20030016487A1 (en) * | 2001-07-06 | 2003-01-23 | Acer Inc. | Method and apparatus of interface conversion for handheld device |
US20030063567A1 (en) * | 2001-10-02 | 2003-04-03 | Stmicroelectronics, Inc. | Ethernet device and method for extending ethernet FIFO buffer |
US20050120253A1 (en) * | 2003-10-24 | 2005-06-02 | Neil Morrow | PC Card controller with reduced number of terminals |
US20050120163A1 (en) * | 2003-12-02 | 2005-06-02 | Super Talent Electronics Inc. | Serial Interface to Flash-Memory Chip Using PCI-Express-Like Packets and Packed Data for Partial-Page Writes |
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US7392954B2 (en) | 2008-07-01 |
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